Catalysts (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Definition of a catalyst
Definition of a catalyst
Substance that speeds up reactions but remains unchanged
Are catalysts consumed in reactions?
Are catalysts consumed in reactions?
No, they are regenerated and can be reused
Are catalysts included in balanced equations?
Are catalysts included in balanced equations?
No
Main role of catalysts
Main role of catalysts
Speed up chemical reactions
How catalysts speed up reactions
How catalysts speed up reactions
Provide alternative pathway with lower activation energy
Effect of catalysts on activation energy
Effect of catalysts on activation energy
Lower it
Definition of activation energy
Definition of activation energy
Minimum energy particles need to react
Result of lowering activation energy
Result of lowering activation energy
More particles have enough energy to react
Effect of catalysts on collision frequency
Effect of catalysts on collision frequency
Higher frequency of successful collisions
Industrial use of catalysts
Industrial use of catalysts
Accelerate reactions too slow for manufacturing
Biological catalysts
Biological catalysts
Enzymes
Examples of enzyme functions
Examples of enzyme functions
Digestion, respiration, DNA replication